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| author | Jens Axboe <jens.axboe@oracle.com> | 2007-11-09 12:52:45 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-11-09 12:52:45 +0100 |
| commit | d85532ed284e63b5c56eaf2418f262822af60be4 (patch) | |
| tree | 2c938f0ebe419ccc18632367c5c9d3f301fc9c36 /block | |
| parent | 8578007065bd27ec077a74b5814f0fe4df040180 (diff) | |
| download | lwn-d85532ed284e63b5c56eaf2418f262822af60be4.tar.gz lwn-d85532ed284e63b5c56eaf2418f262822af60be4.zip | |
block: fix requeue handling in blk_queue_invalidate_tags()
Credit goes to juergen.kadidlo@exasol.com for diagnosing this issue
and supplying the initial patch.
blk_queue_invalidate_tags() must use the proper requeueing paths instead
of open coding the re-add of the request, otherwise we bug out in rq
accounting. Just switch to using blk_requeue_request(), that takes care
of end-tag handling as well and also adds the blktrace REQUEUE notify
event that is also appropriate here.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/ll_rw_blk.c | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 75c98d58f4dd..3d489915fd22 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1143,22 +1143,9 @@ EXPORT_SYMBOL(blk_queue_start_tag); void blk_queue_invalidate_tags(struct request_queue *q) { struct list_head *tmp, *n; - struct request *rq; - - list_for_each_safe(tmp, n, &q->tag_busy_list) { - rq = list_entry_rq(tmp); - if (rq->tag == -1) { - printk(KERN_ERR - "%s: bad tag found on list\n", __FUNCTION__); - list_del_init(&rq->queuelist); - rq->cmd_flags &= ~REQ_QUEUED; - } else - blk_queue_end_tag(q, rq); - - rq->cmd_flags &= ~REQ_STARTED; - __elv_add_request(q, rq, ELEVATOR_INSERT_BACK, 0); - } + list_for_each_safe(tmp, n, &q->tag_busy_list) + blk_requeue_request(q, list_entry_rq(tmp)); } EXPORT_SYMBOL(blk_queue_invalidate_tags); |